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Creators/Authors contains: "McGuinness, Philippa H"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Research)
    In bulk Sr 2 RuO 4 , the strong sensitivity of the superconducting transition temperature T c to nonmagnetic impurities provides robust evidence for a superconducting order parameter that changes sign around the Fermi surface. In superconducting epitaxial thin-film Sr 2 RuO 4 , the relationship between T c and the residual resistivity ρ 0 , which in bulk samples is taken to be a proxy for the low-temperature elastic scattering rate, is far less clear. Using high-energy electron irradiation to controllably introduce point disorder into bulk single-crystal and thin-film Sr 2 RuO 4 , we show that T c is suppressed in both systems at nearly identical rates. This suggests that part of ρ 0 in films comes from defects that do not contribute to superconducting pairbreaking and establishes a quantitative link between the superconductivity of bulk and thin-film samples. Published by the American Physical Society2024 
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